S.C. Code Ann. § 33-44-105
(b) Except as authorized by subsections (c) and (d), the name of a limited liability company must be distinguishable upon the records of the Secretary of State from:
(c) A limited liability company may apply to the Secretary of State for authorization to use a name that is not distinguishable upon the records of the Secretary of State from one or more of the names described in subsection (b). The Secretary of State shall authorize use of the name applied for if:
(d) A limited liability company may use the name, including a fictitious name, of another domestic or foreign company which is used in this State if the other company is organized or authorized to transact business in this State and the company proposing to use the name has: